Having to get up at 5.0 am this morning (to go to the bathroom, as one does) the moon was shining brightly through the curtains. As I wriggled out of bed, I stooped to pick a tissue up off the floor. Couldn't get hold of it! Took a few seconds, in my bleary state to realise I was trying to pick up the moonlight on the floor!
Put it down to old age!